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  <title>Returns a string containing the SQLSTATE returned by the last connection attempt</title>

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</div><hr /><div id="function.db2-conn-error" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">db2_conn_error</h1>
  <p class="verinfo">(PECL ibm_db2 &gt;= 1.0.0)</p><p class="refpurpose"><span class="refname">db2_conn_error</span> &mdash; <span class="dc-title">
   Returns a string containing the SQLSTATE returned by the last connection attempt
  </span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.db2-conn-error-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">string</span> <span class="methodname"><strong>db2_conn_error</strong></span>
    ([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
  ] )</div>



  <p class="para rdfs-comment">
   <span class="function"><strong>db2_conn_error()</strong></span> returns an SQLSTATE value representing
   the reason the last attempt to connect to a database failed. As
   <span class="function"><a href="function.db2-connect.html" class="function">db2_connect()</a></span> returns <strong><code>FALSE</code></strong> in the event of a failed
   connection attempt, you do not pass any parameters to
   <span class="function"><strong>db2_conn_error()</strong></span> to retrieve the SQLSTATE value.
  </p>
  <p class="para">
   If, however, the connection was successful but becomes invalid over time,
   you can pass the <em><code class="parameter">connection</code></em> parameter to retrieve
   the SQLSTATE value for a specific connection.
  </p>
  <p class="para">
   To learn what the SQLSTATE value means, you can issue the following command
   at a DB2 Command Line Processor prompt:
   <strong class="userinput"><code>db2 &#039;? <em><code class="parameter">sqlstate-value</code></em>&#039;</code></strong>. You
   can also call <span class="function"><a href="function.db2-conn-errormsg.html" class="function">db2_conn_errormsg()</a></span> to retrieve an
   explicit error message and the associated SQLCODE value.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.db2-conn-error-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">connection</code></em></dt>

     <dd>

      <p class="para">
       A connection resource associated with a connection that initially
       succeeded, but which over time became invalid.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.db2-conn-error-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the SQLSTATE value resulting from a failed connection attempt.
   Returns an empty string if there is no error associated with the last
   connection attempt.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.db2-conn-error-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-1119">
    <p><strong>Example #1 Retrieving an SQLSTATE value for a failed connection attempt</strong></p>
    <div class="example-contents"><p>
     The following example demonstrates how to return an SQLSTATE value 
     after deliberately passing invalid parameters to
     <span class="function"><a href="function.db2-connect.html" class="function">db2_connect()</a></span>.
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">db2_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'badname'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'baduser'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'badpassword'</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;print&nbsp;</span><span style="color: #DD0000">"SQLSTATE&nbsp;value:&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">db2_conn_error</span><span style="color: #007700">();<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
SQLSTATE value: 08001
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.db2-conn-error-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.db2-conn-errormsg.html" class="function" rel="rdfs-seeAlso">db2_conn_errormsg()</a> - Returns the last connection error message and SQLCODE value</span></li>
    <li class="member"><span class="function"><a href="function.db2-connect.html" class="function" rel="rdfs-seeAlso">db2_connect()</a> - Returns a connection to a database</span></li>
    <li class="member"><span class="function"><a href="function.db2-stmt-error.html" class="function" rel="rdfs-seeAlso">db2_stmt_error()</a> - Returns a string containing the SQLSTATE returned by an SQL statement</span></li>
    <li class="member"><span class="function"><a href="function.db2-stmt-errormsg.html" class="function" rel="rdfs-seeAlso">db2_stmt_errormsg()</a> - Returns a string containing the last SQL statement error message</span></li>
   </ul>
  </p>
 </div>



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